Results 141 to 150 of about 14,156 (170)

Babesia divergens in splenectomised rats

Research in Veterinary Science, 1984
Babesia divergens, from a bovine, was passaged through two gerbils before being injected into splenectomised rats. By repeated passage every three or four days through splenectomised rats higher parasitaemias were gradually obtained. By passage 28 parasitaemias of 60 per cent were recorded.
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Acquired Resistance to Babesia divergens in Experimental Calves

The Journal of Protozoology, 1967
SYNOPSIS. One intact and 2 splenectomized calves were infected with Babesia divergens and the persistence of the parasites in the blood was followed by periodic subinoculations into susceptible splenectomized calves. After periods varying from 3–7 years the parasites failed to be demonstrable by this method.
L P, Joyner, S F, Davies
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Babesia divergens in splenectomised calves: titration of the infective dose

Research in Veterinary Science, 1977
Two experiments were carried out in which Babesia divergens was titrated in splenectomised calves. In the first experiment, a linear relationship was observed between infective dose (10(5)--10(9)) parasites) and onset of disease. In the second experiment, a similar trend was observed for infective doses of 10(2)--10(6) parasites, but 10(3) parasites ...
R E, Purnell, D W, Brocklesby, D J, Hendry, A J, Stark, E R, Young   +4 more
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The Effect of Age on the Natural Immunity of Cattle to Babesia divergens

Research in Veterinary Science, 1971
SUMMARY Three cows aged 6 years were found to be no more susceptible to infection with Babesia divergens than were 3 calves aoed 2 months. A more severe infection occurred in 3 splenectomised calves that were given the same dose of infected erythrocytes.
D W, Brocklesby, E, Harness, S A, Sellwood   +2 more
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Comparative infectivity of Babesia divergens and a zoonotic Babesia divergens-like parasite in cattle.

The American journal of tropical medicine and hygiene, 2006
Babesia divergens-like parasites identified in human babesiosis cases in Missouri and Kentucky and in eastern cottontail rabbits (Sylvilagus floridanus) on Nantucket Island, Massachusetts, share identical small subunit ribosomal RNA gene sequences. This sequence is 99.8% identical to that of Babesia divergens, suggesting that the U.S. parasite may be B.
Patricia J, Holman, Angela M, Spencer, Sam R, Telford, Heidi K, Goethert, Andrew J, Allen, Donald P, Knowles, Will L, Goff   +6 more
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Babesia major in Britain: cross-immunity trials with Babesia divergens in splenectomised calves

Research in Veterinary Science, 1976
Splenectomised calves infected with Babesia major were shown to have no resistance to challenge with Babesia divergens; however, initial infection with B divergens provided a good protection against subsequent challenge with B major. It is suggested that this might mean that B divergens would be the dominant and most commonly encountered species in ...
D W, Brocklesby, D L, Harradine, E R, Young   +2 more
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Chemotherapy of Babesia divergens in the gerbil, Meriones unguiculatus

Research in Veterinary Science, 1983
It was found that surprisingly low doses of four babesicides were effective against Babesia divergens in gerbils and it was concluded that this was due to the involvement of host resistance, which may be of a non-specific nature. The efficacy of the drugs relative to each other was the same in gerbils as in cattle and this host-parasite system is ...
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Improved disease resistance after Babesia divergens vaccination

Parasitology Research, 1998
The efficacy of a new inactivated vaccine against Babesia divergens was evaluated by means of inoculation tests. The infection was initiated by i.v. injection of blood containing 2 x 10(9) living parasites into splenectomized and non-splenectomized calves. Clinical status and hematological parameters were determined.
R, Edelhofer, A, Kanout, M, Schuh, E, Kutzer   +3 more
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Infection of the Mongolian gerbil with the cattle piroplasm Babesia divergens

Nature, 1979
DISEASES of cattle caused by piroplasms are one of the major constraints on the growth of the livestock industry in the tropics. Babesia divergens, which is the common cause of redwater in European cattle, can be transmitted to splenectomised goats, sheep and deer by the inoculation of blood from infected cattle1.
D, Lewis, H, Williams
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Experiments on the transmission of Babesia divergens to cattle by the tick Ixodes ricinus

International Journal for Parasitology, 1975
Abstract A modification of the method of rearing Ixodes ricinus gave a successful method of producing and reliably rearing adequate numbers of this tick for experimental work. Experiments on transmission of Babesia divergens by I. ricinus showed that infections could be initiated only in the adult stage of the tick.
J, Donnelly, M A, Peirce
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